BULL-TROUT. 31 



ABDOMINAL 



MALACOPTERYGIL SALMON I D^E. 



THE BULL-TROUT. 



THE GREY TROUT. WHITLING. ROUNDTAIL. 



Salmo eriox, LINNJEUS. 



,, cinereus aut griseus, WILLUGHBY, p. 193. 



,, griseus sen cinereus, RAY, p. 63, A. 3. 



eriox, Grey, PENN. Brit. Zool. vol. iii. p. 394. 



,, Cambriscus, Sewin, DON. Brit. Fish. pi. 91. 



,, eriox, Grey, FLEM. Brit. An. p. 180, sp. 4-6. 



THE BULL-TROUT is distinguished from the Salmon 

 and Salmon-Trout by several specific peculiarities. The 

 gill-cover differs decidedly in form, as examination of the 

 central figure of the illustration at page 5 will show. 

 The operculum is larger; the free vertical margin much 

 more straight ; the inferior posterior angle more elongated 

 backwards ; the line of union with the suboperculum not so 

 oblique, but nearly parallel with the axis of the body of 

 the fish : the inferior edge of the suboperculum parallel to 

 the line of union with the operculum: the interoperculum 



